Question

Please type a few sentences (about 150 words or so) DISCUSSING: (Please do not just list vocabulary terms.)

• Identify the various types of Hardware Description Languages.

• Describe various features of Verilog Hardware Descritption Languages.

Answer 1

There are many hardware description languages. Some of them are

1)ABEL

2)Advanced Boolean Expression Language

3)AHDL

4)Altera HDL

5)a proprietary language from Altera

6)AHPL

7)A Hardware

8)Programing language

9)Texas Instruments HDL

10)Verilog

11)most widely-used and well-supported HDL

12)VHDL

13)VHSIC HDL

14)most widely-used and well-supported HDL

15)ZEUS

There are many other languages which are not mentioned here

FEATURES OF VHDL:

VHDL(VHSIC Hardware Description Language) begins with the request of standard design and documentation tool for the Very High Speed Integrated Circuits (VHSIC) program and a workshop sponsored by the U.S. Department of Defense was started in 1981. VHDL 2.0 was released under a contract with IEM, Texas Instruments, and Intermatrics. VHDL undergoes further development and standardization, and finally made an IEEE standard in 1987. Verilog was invented by Phil Moorby and Prabhu Goel during the winter of 1983/1984 at Automated Integrated Design Systems (renamed to Gateway Design Automation in 1985) as a hardware modeling language. Gateway Design Automation was purchased by Cadence Design Systems in 1990. With the increasing success of VHDL at the time, Cadence decided to make the language available for open standardization. Cadence transferred Verilog into the public domain under the Open Verilog International (OVI) (now known as Accellera) organization. Verilog was later submitted to IEEE and became IEEE Standard 1364-1995, commonly referred to as Verilog-95.

Verilog HDL is most commonly used in the design, verification, and implementation of digital logic chips at the register transfer level (RTL) of abstraction. It is also used in the verification of analog and mixed-signal circuits. VHDL (VHSIC hardware description language) is a hardware description language used in electronic design automation to describe digital and mixed-signal systems such as field-programmable gate arrays and integrated circuits.